Safety-valve for pneumatic tires.



w. W. MQCREADY & J. G. MYERS.

SAFETY VALVE FOR PNEUMATIC TIRES.

APPLICATION FILED OCT. 18, 1912.

sp e ififesti gtLetteisyatent.

Patented Jtlly 29 1913.

h g ieatia -meti" Cetober' is, 1912. seri'ai 1%.. 726,106.

tifi f i ima i eoneem;

til-test residing"at rfiasedenag in the of the-"invention, such. a's'iyill: "gble others ui'ekeieiidflllseftheseine: 1 a iTh'i's invention reletes (to se-fet flheobjeet of the-iliitei'litioh' nroiri sion 015.2 valve of 'thefchametrnamed mi t-Sim whieh'i will ."serve to f'e-htoma'tica11y" relieve 1 the-pressure in apneunizi tic; tire-when same hasbeen ijziised above a predetermined :pqint; and

r gt'ufther object off'the invention res-ides e provision" of a safety val'vefor- .pneu' i etile tire s which Indy-be .gidj-usted soas P op'e'i'zi-te eutoi'natieally' underthe influence I 0f d'ifereil'teit pressures-within the tire, the

of the valve 1 being reontrolled gi ended cla m- .pneur'netietires 'ivhichfwill:hesirnple in 9011- *stljuction, dil'i zthleefficient in operation; ea's: ii'ly llt pplied jtoany typeof tii eihhd which spill-2'13 be] manufactured z t-e com'pai atn ely X-Vit-hthe-vab oifeand other objects :in View thein vention consists'in' the details of, c 0n-' stpuc'tion andin-Qthe arrangement andc'om- --:"bina .tion of pertsto" be hereinafter {more full y'described and part culerly pointed out A "In; describingthe "invention in detail tef- ".Ierehc'e iyfill hefhad-t'o the' accompanying; diawings wherein like, characters o f ,-refe ene'e, denote :correspondihg .;part-s in1=f the sevureslis' .a' v'iew i: elevation oftheimfP ljQVed Vali/ie,jSaIIi .beingshown scoured-t0: [apart of an automobile'tire; "Fig. 2 a Yer t1- ea-lseCti nof what is show'n.- -in Fig-.1. 1kg, 3i 'a' View sirhiler to Fig. 2 s hoyving.the parts flthe valve" in the pesition they wo u d 0c up under"=tlie influence of an "excessanee l n of 1 un'ty of Los' Aingeles', State. of California, l -li evet d, c n ime-lied. li 'l Prfovements;iiiSaftfV'alvS;fox-Pneumatic Tiles; end'gwe" d0 ht rebydeelare thfefollow-I ing to bei-af-fulh cleen and ex zicit deseript' ion 1o fkille'd 'i-iithejart It'owhich i ei't 'iii s tof (whereby theb'urstingofthe t-ii e as a re- 7 "of fejgicess pressure tl'i'erem is prevented;

I? I Ref.eriiiig to the drewingg the- Valve is shown a's "compr1sing .a tubular. member 10 of any deSit'ed materialend the bore of,

which includes an enlarged. outei portion 11 and}; redu'oed. =inner portion 12; -Betyveen the enlarged outer portion 11' and reduced inner portion 12 'thebozfe of the 'membei lO" relief valve A. This relief valve A is else the-seat 13. It will be noted'thzit the seat. 13

'aii-d end '14 need not be necessarily ofithe shape disclosed but maybe 0f any desired s 'h;ip'e" that will enhancefth'e convenience of- Qmanufeeture. The relief-valve is further "provided just inward of the rounded end 14 with a circumscribing flangef 15-; which latter is provided withair iventslfland is disposed in spaced relation to the-shoulder,

[formed at the inner end of the enlaig'edportion 11 of the bore of -the member 10 when} "the-rounded end 11' of the relief valve-"A is:

disposed upon the ,seat- 113. The inner end "of the tubular member 10 ispr evided with.-

a .cirounsc 'ibiiig' flange 17, and isjredueed; exteriorly inwardly of -the flanged? as' et.

18.: The tubular member 10 is provided hetwee'nthe reduced portion 18.2md the iotiter endthereof threads 19,

with interrupted exterior In applyingthe valve to itPILlllllaticHli'lfQ indicated 'at 13,; the latte! is engaged oven the flange '17 and clamped to the valve neans of a asher 'and l'oclfmitj 21 while Y a flock washer 22 clamps agaiiist the felly.v of the wheel, the lock nut 21-a'nd lock Wzisheg- 22 working on the threads 19.1 The "outerend of. the enlarged portion 11 oft-he'bore adjusting nut 21 through which the relief of the tubular membeplO- iS threaded-as at "23 and engaged with the thiea-ds 231s. 21-11 valve A is adapted"t0:sl-ide. The-nut 21'is; locked in place by ine'an-S Of a; ir a sher' 4x0 and a-leck.nutihlit-being noted that their. a

terioiv well of the washer 4 O'isi-pro'videdivijth opposite -fla.'t" fac'es 12 whieh engage con-e 'sjpoiiding flet fa eesiofj the teliefevalve-A and against rem-awe meta-0n 0 2;. the *re'lief valve! willr'belgfuftheixznotedthat tlie'iye'sheiy e0; jro ided extep ply?-With-[oppositelyxiii? p jentin f which engage In this' in a-nnei ithej wtsherff-loj is locked grooves- 44 for'mfedfinthefltvaH: of the bore.

IL-and' i'l'iei'ehy the wa t -40 is, locked against relative mtation \'rith re's'peetto the inember 10 is isllikewise the'relief valve A] locked against rota ion relatively to the member 10. The inner end j'ofithe' bore of the tubular. member ofwhieh the relief valve A is formedis reduced so'a s. tojPrOduee, a shoulder 25 and mounted in the larger "por- I tion. of the bore of the tiibularflineinher of which the relief-valveA is formed is a check vvalve of the usual andwelilhnown con;. stru-ction and through theinst fnment hty of," which air is supplied to .th'efinterior of the ftir e- B .r The outerend of the tliblliafnielih; ber forming part of the (Ei'lfiCi.f'VtiiV( G-. is:

threaded 'ext-eriorly as at. '26: and engaged with these threads is a lcapQT/Wher'eby leak-- 'i 'ge'ofthe .valve 'C is provicled aga-instf :It will he'noted. that the- 27 can serewed upon the outer end of 111i 1-1i vali'e 'A withont effecting any rotation of the latter;

' mosphere.

Encirelingthe t bnifa r ineni her of which the. valve A is formed-1s a spiral .'spring 28 one .e ndgof which bears againstjthe flange 15 whilethe other end bears against thenut 21.- It \Ylii be noted that the flange-we'iso serves as a bearing for the vjalveA during movement of the latter. The'tension" of this .spring- 2S'may be varied as-desired hyadustmg the nut 24. The tubular member 10 is provided with a vent 29-.dis'posedbetween the flange '15- and the nut 2 1,-- The outer end ofthe' tnhula r-mem'b'enlt) is closed b g foap 30 the boreof which zititsopen. eii; is redried and threaded and engaged ,with the threads 19. By thus reducing the bo'reof the cap 30 the inner portionof-said bore will be disposed in spaced relation to the elite-l rior "wail of the member 10 so as =not'to ob struct the 'pass'ageof air through thevents' 29 to the interior-of the 6511130; -Ti1e outer end of the cap 30 is provided with ,az'iient 31 whereby air delivered to interior-of the cap may readily escapetof the! at;

In the use ofthe valve the adjusting-nut;

2-4 is positioned sons to. i npilrt the-desired tension to the sprinir and air thenapphed- -to the interior of t- 1e tire 1n-the-usnaiend well known n'mnnerf As s-oonjzrsthe'p res sure of air within thetire becomes excessive;

its-the result of heat or any othereanse-the relief vaive A will hernoved' out-wardlybf the tiihular' m ember 10 and the. round-ed end 14 of the relief -valve lifted from the" seat 13. Air will then pass fronithe'inte'rio-r of the tire through the-vents 16,; vents;2 9 to the interior of the eap'30iandtheiice through the rent. 31 tot-he atmospheief In-thismen-Y- ne-r the tire will be relieved of excessire pressure and the bursting of'sam.e,'t:hereby, 1

'feonn'ection with afpn'eumz tie tire the nner end of its bore reduced to. forifn 'secondena ned. tubular infeniheljx -.threaded on "the -otiter endiofth-e second-= inanied tubular member," nd a eapthreq; on- .the;first-named;tubularnemhely v second-named cap having .a', perforation,- in

- crown andhaving its' SideTW'aII SpjaC ed nrevented 5 As soon as-the 'iaie'ssure' -in-th'e, t re is reduced tO HOITmaI the relief, vaheAH will inore inward of the men be'r 1Q tinder" the influence of the-sFi-ingQSV-SQ :is tofposif tion the rounded end 14 mm 13 and thereby prevent further escape. of ,air "front the-interior of theitire; W but we eiaim 1 lnfa valve structure, of -th .3; class; ,decribed, the .combination" of; a t'n'bulii rumernr;

her provided with --me'ans [alt- 2011?" end relief Valve seat jand' fi-lrther proyided :vfith member siidably' arranged i in engagement. with the .i n'n'eil Wall of ;fh e

vents in its" 'wa11 eoniniinieeting with- Q-th'e mmorportion [of ts bore,

first n'ained tubular inein'b'er -;;ind provided with air. vents coi'inecting portions the bore on opposite sides of'st ifdflange, an ad usting nut threzided'in the-major portienof the bore of the first' nanied tuhn'lar rneiiiiier and through which theiseeond-Iia'med tt hn;

121i ineinber is adaptedtojslid'e, ii -looknut;

threaded in the. first-named tubular menf ber' outwardly of the :i dj nsting mike vspring sziid adjusting nutfand i-ts' other. end n onlgageinent with said eiren nseifibirig?v flfilng- .;wli e1fehy the second-named Ltiibulhr'fineni her' is held normal1y,fiigaged against the t e .seat' of the first-named tuhu1ar=- map from the wall of the -fi15st5hzuned t nhi laif nieinoer whereby the fvenfls. in the-"well of encircling the second-named 'tighiiiar: ne' nher and having one end n engagement w th the Ifirstntitn'ed tiibu'lar lne nberhvilt connect the. interior-of "the'seeond-nain'ed cap and the magor portion of the' hor efo ff the first named tubular meniben turesin presence of twof -Witnesses.

Winnie; W.- McCRiA-DY.% JOHN MYERS Witnesses:

MCNELLEY,;

. Z; F AB ICK, 

